Head assembly for brewing apparatus

ABSTRACT

According to embodiments described in the specification, a head assembly for a brewing apparatus is described. The head assembly includes a lid portion coupled to a fixed base portion and movable between open and closed positions; a lock coupled to the lid portion and slideable between locked and unlocked positions; a lever with a first end connected to the lock, an axis point connected to the lid portion, and a second end; and a cover movably coupled to the lid portion and abutting the second end of the lever, such that pressure on the cover rotates the lid portion to the closed position, and rotates the lever so as to slide the lock into the locked position.

FIELD

The specification relates generally to machines for brewing beverages,and specifically to a head assembly for a brewing apparatus.

BACKGROUND

Single-serving beverage dispensing machines, or brewing apparatuses, arecommonly used in office and residential settings. Such machines providequick, convenient and freshly prepared beverage servings. In general,beverages are produced in such machines from disposable cartridgescontaining soluble products such as coffee grounds or tea leaves.

The brewing process in such machines generally involves the injection ofhot water under pressure into the cartridge, through the beverageproduct, and out of the cartridge into a cup or mug. This processnecessitates the placement of a cartridge in the machine, and mayrequire the ejection of a previous, spent cartridge. In addition, thenew cartridge generally must be punctured in two locations—one to injectwater, and the other to extract brewed beverage. These variousmechanical operations can require a user to make multiple movements andinvolve complex structures, resulting in poor ergonomics and increasedrisk of mechanical failure.

BRIEF DESCRIPTIONS OF THE DRAWINGS

Embodiments are described with reference to the following figures, inwhich:

FIG. 1 depicts an isometric view of a head assembly for a brewingapparatus, according to a non-limiting embodiment;

FIG. 2 depicts an isometric view of the head assembly of FIG. 1 in anopen position, according to a non-limiting embodiment;

FIG. 3 depicts an exploded isometric view of the lid portion of the headassembly of FIG. 1, according to a non-limiting embodiment;

FIG. 4 depicts a side elevation view of the lid portion of the headassembly of FIG. 1, according to a non-limiting embodiment;

FIG. 5 depicts an isometric view of the head assembly of FIG. 1assembled with a cover, according to a non-limiting embodiment;

FIG. 6 depicts certain components of the lid portion and base portion ofthe head assembly of FIG. 1, according to a non-limiting embodiment;

FIG. 7 depicts certain components of the base portion of the headassembly of FIG. 1, according to a non-limiting embodiment;

FIGS. 8A and 8B depict the components of FIG. 7 in various positions,according to a non-limiting embodiment;

FIG. 9 depicts a side elevation view of certain components of the lidportion and base portion of the head assembly of FIG. 1, according to anon-limiting embodiment;

FIG. 10 depicts an isometric view of a shuttle component of the headassembly of FIG. 1, according to a non-limiting embodiment; and

FIG. 11 depicts an isometric view of the head assembly of FIG. 1 in aninstalled orientation, according to a non-limiting embodiment;

FIG. 12 depicts an isometric view of a brewing apparatus with a headassembly according to another non-limiting embodiment;

FIG. 13 depicts an isometric view of the head assembly of FIG. 12,according to a non-limiting embodiment; and

FIGS. 14A, 14B and 14C depict a cover and latch of the head assembly ofFIG. 12, according to a non-limiting embodiment

FIG. 15 depicts an isometric view of a head assembly for a brewingapparatus according to a further non-limiting embodiment;

FIG. 16 depicts an isometric view of certain components of the headassembly of FIG. 15, according to a non-limiting embodiment; and

FIGS. 17A and 17B depict isometric views of a pinion gear and associatedcomponents from the head assembly of FIG. 15, according to anon-limiting embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENTS

FIG. 1 depicts a brewing apparatus head assembly 100, also referred toherein as head 100. Briefly, a brewing apparatus receives beveragecartridges, containing, for example, dried ground coffee, tea, juicecrystals, soup mix and the like. Having received a cartridge, theapparatus injects water at various temperatures and pressures (dependingon the beverage being brewed) into the cartridge and collects brewedliquid from the cartridge, for dispensing into a cup. Some components ofthe brewing apparatus are not shown in FIG. 1, such as a waterreservoir, power source and the like. It is contemplated that head 100can be used in conjunction with any suitable forms of such components,as will occur to those skilled in the art. In general, head 100 includesthe structures for receiving cartridges, injecting water and collectingbrewed liquid.

In the discussion below, terms such as “upper”, “lower” and the like aremade in reference to the apparatus in the installed, ready-to-useposition, which is reflected in the Figures.

Head 100 includes a base portion 104 having an outer wall 106 definingthe sides thereof, and a lid portion 108 coupled to base portion 104.Base portion 104 is fixed (e.g. immovably attached to the remainder ofthe apparatus), while lid portion 108 is movable. In particular, lidportion 108 is rotatable between an open position for receiving acartridge, and a closed position for sealing the cartridge within theapparatus (specifically, within head 100). Lid portion 108 is rotatableabout an axis 110, which can be provided by a hinge connecting lidportion 108 to base portion 104.

In FIG. 1, lid portion 108 is shown in the closed position. Turning toFIG. 2, lid portion 108 is shown in the open position. As seen in FIG.2, lid portion 108 is rotated about axis 110 so as to swing upwards frombase portion 104, exposing an upper surface 112 of base portion 104.Upper surface 112 has an opening defined therein for receiving acartridge (not shown) in a cartridge holder 114. Thus, when lid portion108 is in the open position, base portion 104 is able to receive acartridge, and when lid portion 108 is in the closed position, thecartridge, seated within cartridge holder 114, is sealed within head100. Lid portion 108 carries an injection pin (not shown) for puncturinga cartridge in holder 114, and can also include a seal (e.g. a rubber orsilicone ring) around the injection pin. The injection pin, in thepresent example, has a flat tip rather than a pointed tip. However, itis contemplated that a wide variety of injection pin designs can beused.

Base portion 104 and lid portion 108 can be manufactured from anysuitable combination of materials, including plastics (e.g. ABS), metals(e.g. aluminum) and the like. As will be discussed in detail below, lidportion 108 is configured to transition from the open position to theclosed position and to lock onto, or engage with, base portion 104, inresponse to a force applied to lid portion 108 by way of a singlemovement (for example, of a user's hand).

Turning now to FIG. 3, an exploded view of lid portion 108 is shown. Lidportion 108 includes a base plate 300, a tower 304, a lever 308 and asliding lock 312. As can be seen from FIGS. 1 and 2, base plate 300connects to base portion 104 when head 100 is fully assembled. Inaddition, base plate 300 supports tower 304, level 308 and lock 312.Base plate 300 can include one or more (three are shown in FIG. 3)raised pylons 314 for anchoring springs connected to base portion 104.The springs (not shown) bias lid portion towards the open position.

Lock 312 is slideably coupled to base plate 300. The nature of thecoupling is not particularly limited. In the present example, lock 312includes a substantially planar member 315 supporting two pairs ofraised members 316 (a first pair is identified in FIG. 3), each raisedmember defining an eyehole 320 therethrough. Planar member 315 isarranged, in the assembled configuration, substantially parallel to baseplate 300. A bar 324 is fastened to each pair of raised members 316. Forexample, one or both of the eyeholes 320 can be threaded, and an end ofbar 324 can include corresponding threads, as seen in FIG. 3. Further,base plate 300 includes one or more raised members 328 for each bar324—each raised member 328 includes an eyehole for slideably receivingbar 324.

Thus, when lid portion 108 is assembled, lock 312 is coupled to baseplate 300 as a result of bars 324 protruding through raised members 328and being fixed to raised members 316. Lock 312 can therefore slide inthe direction of the longitudinal axis of bars 324, as bars 324 slidethrough raised members 328. In other words, lock 312 is configured toslide in a fixed direction in a plane substantially parallel to baseplate 300.

Lock 312 is slideable between a locked position for engaging baseportion 104 when lid portion 108 is in the closed position, and anunlocked position for releasing base portion 104. In the lockedposition, lock 312 is displaced along base plate 300 towards tower 304and the “rear” end of base plate 300, where lid portion 108 connects tobase portion 104. In the unlocked position, lock 312 is displacedtowards the opposing “front” end of base plate 300 and away from tower304.

As seen in FIG. 3, lock 312 includes a pair of hooks 332 depending fromplanar member 315 of lock 312. Base plate 300, meanwhile, includes acorresponding pair of apertures 336 defined therethrough for receivinghooks 332. Referring now to FIG. 4, a side view of lid portion 108 isshown, in which a hook 332 can be seen protruding through base plate 300via an aperture 336. As will now be apparent to those skilled in theart, when lock 312 transitions between the locked and unlocked positionsby sliding in direction A, hooks 332 will also slide in direction A andengage corresponding structures on base portion 104.

In particular, referring briefly to FIG. 2, upper surface 112 of baseportion 104 has an opening 116 defined therethrough corresponding toeach hook 332. When lock 312 is in the unlocked position, hooks 332extend through openings 116 but do not engage base portion 104 (that is,hooks 332 can be readily removed from openings 116). When lock 312 is inthe locked position, however, hooks 332 extend through openings 116 andunderneath upper surface 112, such that hooks 332 cannot be removed fromopenings 116 until lock 312 returns to the unlocked position.

It is contemplated that hooks 332 can include slanted surfaces at theends thereof, so as to pull lid portion 108 towards base portion 104 aslock 312 slides into the locked position. As a result, the pressure ofthe seal between lid portion 108 and base portion 104 can be increased.In the present example, the seal generated between lid portion 108 and acartridge within holder 114, when lid portion 108 is in the closedposition, can withstand pressure of about 50 PSI.

Returning to FIG. 3, the movement of lock 312 between the locked andunlocked positions is provided by lever 308. Lever 308 has a first end340 for connecting to lock 312. In the present example, a pin 344 isreceived through the opening at first end 340, although it iscontemplated that any suitable means of connecting first end 340 to lock312 may be used. Lever 308 also includes an axis point 348, about whichlever 308 can pivot, and a second end 352.

Lever 308 is supported by tower 304. In particular, axis point 348 isrotatably coupled to tower 304 at support 356 (for example, by way of ascrew or pin received through each side of support 356 and through anopening at axis point 348). Additionally, lever 308 can include twoarticulating members, as shown in FIG. 3, with a first member definingfirst end 340, and a second member defining axis point 348 and secondend 352. As seen in FIG. 3, the first and second members can rotaterelative to one another at joint 360.

Turning again to FIG. 4, the operation of lever 308 will now be apparentto those skilled in the art. When a force is applied to second end 352of lever 308, substantially in the direction labelled “F”, second end352 is displaced downwards and lever 308 rotates about axis point 348.The rotation causes first end 340 to pull “back” towards tower 304, thussliding lock 312 into the locked position. Conversely, when the forceapplied to second end 352 is removed, lever 308 can rotate in theopposite direction to slide lock 312 “forwards” (to the right in FIG. 4)into the unlocked position. In some examples (not shown), one or both oflever 308 and lock 312 can be biased towards the unlocked position bysprings.

In order to facilitate the application of a force to second end 352,head 100 also includes a cover. Referring now to FIG. 5, head 100 isshown in an assembled state, include a cover 500. Cover 500, alsoreferred to as a shell, substantially encloses lid portion 108, and isrotatably coupled to lid portion 108. For example, a fastener 504 (andan opposing fastener on the other side of cover 500, not shown) canextend through cover 500 to be received in tower 304 (in particular, inan opening 364, shown in FIG. 3).

In operation, a force in the direction F (as also seen in FIG. 4) isapplied to the upper part of cover 500, when lid portion 108 is in theopen position. As a result, the interior of cover 500 contacts secondend 352 and causes lid portion 108 to travel to the closed position, asshown in FIG. 5 (the force required to rotate lever 308 is high enoughthat lever 308 does not rotate before lid portion 308 is in the closedposition).

Once lid portion 108 is in the closed position, continuing applicationof the force rotates cover 500 about an axis defined by fasteners 504,such that cover 500 continues to “close” until it reaches its closedposition. Thus, cover 500 continues to press downwardly on second end352 after base plate 300 has contacted upper surface 112 of base portion104 (that is, after lid portion 108 has reached its closed position).This causes lever 308 to rotate and pull lock 312 into the lockedposition, in which hooks 332 engage base portion 104 and prevent lidportion 108 and base portion 104 from being separated. Second end 352includes a bearing surface, which can be provided by a roller bearing366 (shown in FIGS. 3 and 4) for facilitating motion of the interior ofcover 500 against lever 308. Other structures can also provide thebearing surface instead of roller bearing 366, such as a surfaceprovided with a low-friction material (not shown).

Cover 500 can be maintained in the closed position by a latch 508, shownin detail in the inset of FIG. 5. Latch 508 comprises a button 512accessible from the outside of cover 500, and a latch arm 516 internalto cover 500. Latch arm 516 engages upper surface 112 (for example, byway of a lip formed on upper surface 112), and pressing button 512rotates latch arm 516 away from upper surface 112 so as to release cover500 (and, by extension, lid portion 108).

As will now be discussed in connection with FIG. 6, head 100 is alsoconfigured to eject a spent cartridge from cartridge holder 114 when lidportion 108 moves from the closed position to the open position. Lidportion 108 is shown in FIG. 6, excluding tower 304, lever 308 and lock312 for illustrative purposes. Some internal components of base portion104 are also shown, though outer wall 106 of base portion 104 isomitted.

As seen in FIG. 6, base plate 300 of lid portion 108 is rigidly coupledto an articulated arm 600. In the present example, the rigid coupling isaccomplished by way of a pair of holes 602 extending from the outer edgeof base plate 300 through the proximal end (that is, the end closest tobase plate 300) of arm 600. Fasteners, such as bolts or screws, areinserted through holes 602 to rigidly couple arm 600 to base plate 300.It will now be apparent that other suitable arrangements of holes andfasteners can also serve to couple arm 600 and base plate 300. Othermeans of coupling arm 600 to base plate 300 are also contemplated. Forexample, arm 600 can be glued or welded to base plate 300, or arm 600can be integrally formed with base plate 300.

Arm 600 includes a first member 604, and a second member 608, rotatablycoupled to each other at a joint 612. A distal end 616 of arm 600 (thatis, the end furthest from the connection to lid portion 108) includes afastener, such as a bolt or screw, or other protuberance which travelsin a guide channel in outer wall 106 of base portion 104. The guidechannel is not shown in FIG. 6, but can be seen in FIGS. 1 and 2,labelled 120. Joint 612 can also include a protuberance which travels ina groove on the inner surface of base portion 104 (not shown).

Thus, due to the rigid connection between arm 600 (specifically, firstmember 604 of arm 600) and base plate 300, when lid portion 108 moves tothe open position in the direction labelled “B”, joint 612 is caused tomove in the direction “C” and distal end 616 is caused to move,constrained by guide channel 120, in the direction “D”. As a result ofmoving in direction “D”, distal end 616 will strike a dog 620, as willbe discussed in greater detail in connection with FIG. 7.

Referring now to FIG. 7, arm 600 and cartridge holder 114 are shown inisolation from the remainder of head 100. Cartridge holder 114 is shownholding a cartridge 700. As discussed above, the opening of lid portion108 causes distal end 616 of arm 600 to travel in direction “D” andstrike dog 620. Dog 620 is rotatably coupled to holder 114, and includesa rim 704 configured to strike a surface 708 of holder 114 so as toprevent further rotation of dog 620 relative to holder 114 in onedirection. In other words, dog 620 is prevented from rotating relativeto holder 114 in a counter-clockwise direction as shown in FIG. 7 oncerim 704 has come into contact with surface 708. However, dog 620 canrotate freely relative to holder 114 in a clockwise direction as shownin FIG. 7. In some examples (not shown), dog 620 can be articulated,such that a first portion is fixed to cartridge holder 114, and a secondportion is rotatably coupled to the first portion (rather than theentirety of dog 620 being rotatable relative to holder 114).

When distal end 616 strikes dog 620, therefore, rim 704 will contactsurface 708 and dog 620 will be prevented from further rotation relativeto holder 114. However, holder 114 is rotatably mounted within baseportion 104, and rotates about the same axis as dog 620. Therefore, oncerim 704 has contacted surface 708, as distal end 616 continues to travelin direction “D”, both dog 620 and holder 114 rotate together indirection “E”.

Referring now to FIG. 8A, arm 600 is shown following the opening of lidportion 108. As a result of distal end 616 travelling through guidechannel 120, distal end 616 has caused dog 620 and holder 114 to rotateso as to tip cartridge 700 out of holder 114. The ejected cartridge canbe collected, for example in a storage bin (not shown) connected to baseportion 104.

It is contemplated that the axis of rotation of holder 114 can be placedoff-centre (in the present example, closer to the “back” of head 100,where lid portion 108 and base portion 104 connect) so as to facilitatethe rotation of holder 114 back to a resting position (that is, in adirection opposite to “E”) for receiving a new cartridge. To that end, aweight 800 can also be coupled to holder 114 to facilitate suchrotation. As seen in FIG. 8B, second end 616 descends away from holder114 and dog 620, allowing holder 114 to return to the resting position.Dog 620 is free to rotate in the clockwise direction shown, in order toallow distal end 616 of arm 600 to return to the position shown in FIG.7 as lid portion 108 is moved into the closed position.

It will now be apparent to those skilled in the art that othermechanisms are also suitable for implementing the cartridge ejectiondiscussed above. For example, instead of dog 620 being rotatable, dog620 can be fixed to holder 114 and distal end 616 can include a memberthat is rotatable in one direction only. Therefore, distal end 616 cantip holder 114 as lid portion 108 is opened and the member contacts dog620, but will not disturb holder 114 as lid portion is closed againbecause the member at distal end 616 will rotate upon contact with dog620, to allow the member to pass dog 620 without causing holder 114 torotate.

Referring now to FIG. 9, head 100 is also configured to ready a newlyreceived cartridge for brewing as lid portion 108 is closed. Inparticular, head 100 includes a shuttle 900 mounted within base portion104. Shuttle 900 is slideable within base portion 104 along rails 904(one shown in FIG. 9) and includes a yoke 908 configured to engage hooks332 of lock 312. Thus, as lock 312 slides to the locked position, asdiscussed above, shuttle 900 slides from a resting position in direction“G” to a brewing position, towards holder 114 and the cartridgesupported therein.

Referring now to FIG. 10, shuttle 900 is shown in more detail. Inparticular, both rails 904 are shown in FIG. 10, as is yoke 908. It iscontemplated that yoke 908, or any other portion of shuttle 900, can becoupled to one or more springs for biasing shuttle 900 towards theresting position (corresponding with the open position of lid portion108).

Shuttle 900 supports a hollow extraction pin 1000 for puncturingcartridge 700 and allowing brewed liquid to exit cartridge 700. Thebrewed liquid is guided by a channel 1004 into a cup or other receptacle(not shown) below shuttle 900.

As shown in FIG. 9, shuttle 900 does not slide in parallel with baseplate 300 of lid portion 108. Instead, shuttle 900 slides on an anglewith respect to base plate 300 (the direction “G” is not horizontal asillustrated in FIG. 9, while base plate 300 is horizontal), due to theangle of rails 904. The angle is not particularly limited, and ingeneral is selected in order to prevent extraction pin 1000 frompuncturing a filter within cartridge 700. Filters are often conical ortriangular in shape within cartridges, and thus extraction pin 1000 isless likely to puncture the filter if it punctures cartridge near thebottom thereof.

Returning to FIG. 10, extraction pin 1000 can also be bent downwards,away from lid portion 108 such that it punctures cartridge 700 closer tothe bottom thereof, as shown in the magnification of extraction pin1000. Further, a set screw (not shown) can be provided to adjust thedistance that extraction pin 1000 extends from shuttle 900.

Therefore, the transition of lid portion 108 from the closed position tothe open position serves to eject a spent cartridge, and the followingtransition of lid portion 108 back to the closed position serves to locklid portion 108 and base portion 104 together and puncture a newlyinserted cartridge (both by the injection pin and extraction pin 1000),readying head 100 for brewing.

Variations to the above are contemplated. For example, holder 114 can beremovable, such that a variety of different holders can be used withhead 100, for accommodating a variety of cartridge configurations (suchas soft pod cartridges, shelled cartridges, and the like).

In addition, although FIGS. 1 and 2 show head 100 in a substantiallyhorizontal orientation (that is, upper surface 112 of base portion 104is substantially horizontal), it is contemplated that in use, head 100can be installed on the brewing apparatus at an angle, to facilitate theplacement of cartridge 700 into holder 114. For example, head 100 can beinstalled such that upper surface 112 is at an angle of between about−20° and about −35° from horizontal (that is, 20 to 35 degrees belowhorizontal). An example of such angled installation is shown in FIG. 11.

In another variation, lid portion 108 can include a splash guard aroundthe seal surrounding the injection pin. For example, the splash guardcan include a wall depending downwardly from base plate 300, towardsbase portion 104.

Turning now to FIG. 12, a further variation of head assembly 100 will bedescribed. FIG. 12 illustrates a brewing apparatus 1200 including a headassembly 1204 (also referred to as head 1204). Brewed liquid exitingfrom head 1204 is collected in a cup 1208. As mentioned above, head 1204is angled downwardly from the horizontal; such an orientation canimprove the ergonomics of operating head 1204. In other embodiments,however, head 1204 can be placed horizontally. Brewer 1200 also includesa display 1212, such as an LCD display, which can be used to present andselect brewing options and the like.

Head 1204 is shown in isolation from the remainder of brewer 1200 inFIG. 13. A cover (to be discussed in greater detail below) of head 1204is also omitted in FIG. 13, to show the internal components of head1204. In particular, head 1204 includes base portion 1304 fixed to theremainder of brewer 1200, and having substantially the same componentsand structure as base portion 104, described above. Certain minordifferences between base portion 1304 and base portion 104 will bediscussed further below.

Head 1204 also includes a lid portion 1308. Lid portion 1308 is coupledto base portion 1304, and is rotatable about an axis 1310 between anopen position for receiving a cartridge, and a closed position forsealing the cartridge within the apparatus (specifically, within head1204). Axis 1310 is provided by a hinge connecting lid portion 1308 tobase portion 1304.

Lid portion 1308 includes a base plate 1312, which is substantially asdescribed above in connection with base plate 300. Lid portion 1308 alsoincludes a spring 1313 connected to base plate 1312 and extendingupwards from base plate 1312, as well as a lock 1314. Lock 1314 includesa planar member 1315 and raised members 1316 with eyeholes 1320, asdescribed above in connection with planar member 315, and raised members1316 defining eyeholes 320, respectively. Raised members 1316 areconfigured to receive bars 1324 (only one shown in FIG. 13) which passthrough corresponding raised members 1328 fixed to base plate 1312.Hooks 1332 (one shown in FIG. 13) depend from planar member 1315 in thesame manner as hooks 332 described above, for extending throughapertures in base plate 1312 and engaging with structures of baseportion 1304.

Thus, lock 1314 is slideably coupled to base plate 1312 in the samemanner as lock 312 was coupled to base plate 300. Lock 1314 is thereforeslideable between a locked position and an unlocked position, asdiscussed earlier. However, the actuation of lock 1314 differs somewhatfrom that of lock 312. Rather than tower 304 and lever 308, lock 1314 isactuated by a pair of articulated arms 1340 (only one shown in FIG. 13to avoid obstructing the view of other parts). Each arm 1340 isconnected at one end to base plate 1312, and at an opposing end to lock1314 (for example by way of raised members and pins). Arm 1340 has ajoint or hinge 1344 in between the two ends, allowing arm to bend abouthinge 1344. A downwards force “F” applied to arm 1344 thus straightensarm 1344, pushing lock 1314 into the locked position (since the endcoupled to base plate 1312 near the front of head 1204 cannot move, theend of arm 1344 coupled to lock 1314 moves). Such a force can beapplied, for example, to a roller bearing 1348 connected to arm 1340 athinge 1344. Removing the force “F” allows arms 1340 to bend and lock1314 to slide back towards the unlocked position. Lock 1312 can bebiased, for example by springs (not shown), towards the unlockedposition.

The force mentioned above for sliding lock 1314 into the locked positionis supplied by movement of a cover 1400, illustrated in FIGS. 14A and14B. Cover 1400 is rotatable with respect to base portion 1304 about thesame axis 1310 as lid portion 1308. For example, fasteners can be usedto connect cover 1400 to base portion 1304 by extending throughapertures 1404 shown in FIG. 14B. As seen in FIG. 12, cover 1400supports display 1212.

FIG. 14A shows a bottom view of cover 1400, and reveals that cover 1400includes a pair of ledges 1408 extending downwardly and into theinterior of cover 1400. FIG. 14B shows the protrusion of one of ledges1408 into the space within cover 1400 more clearly. As will now beapparent, when cover 1400 is connected to the remainder of head 1400 asshown in FIG. 12, ledges 1408 are disposed above arms 1340, andspecifically above roller bearings 1348. Thus, downwards motion of cover1400 in relation to lid portion 1308 results in ledges 1408 contactingand applying downwards pressure on roller bearings 1348.

It will also now be apparent that as in the case of cover 500, cover1400 is permitted to move independently of lid portion 1308 to a certaindegree. FIGS. 14A and 14B show a recession 1416 defined by the interiorwall of cover 1400, for receiving an end of spring 1313. Spring 1313 istherefore connected at one end to base plate 1312, and at the other endto cover 1400. Thus, when lid portion 1308 is in the open position,downwards pressure on cover 1400 is transferred to lid portion 1308 viaspring 1313 until lid portion 1308 contacts base portion 1304 (that is,until lid portion 1308 reaches the closed position). Cover 1400subsequently continues to move downwards, compressing spring 1313 andmoving lock 1314 to the locked position. Cover 1400 can be held in itsclosed position by a latch 1420 shown in FIGS. 14B and 14C. Latch 1420includes a catch 1424, which engages base portion 1304, and a button1428 which, when pressed, rotates latch relative to cover 1400 about ahinge point 1432, releasing catch 1424.

When catch 1424 is released, spring 1313 (which was compressed duringthe closing of cover 1400) pushes cover 1400 upwards relative to lidportion 1308, allowing lock 1314 to release (that is, slide to theunlocked position). Lid portion 1308 and cover 1400 can then be rotatedupwards together, bringing lid portion 1308 towards the open position toreceive another cartridge. The same cartridge ejection functionalitydescribed above in connection with head 100 is provided to head 1200.

Turning now to FIG. 15, another variation of head assembly 100, andparticularly of the locking mechanism, will be described. FIG. 15 showsa head assembly 1500, omitting the brewing apparatus to which headassembly 1500 is mounted. The nature of the brewing apparatus is notparticularly limited. For example, head assembly 1500 can be used withbrewing apparatus 1200, in place of head assembly 1204.

Head assembly 1500 includes a base portion 1504 which is as describedabove in connection with base portion 104. Head assembly 1500 alsoincludes a cover 1508 which, like cover 1400, is rotatable relative tobase portion 1504, about an axis 1510 (similar to axis 1310 shown inFIG. 13). Coupled to cover 1508 is a handle 1512. Handle 1512 isrotatable relative to cover 1508 about an axis 1514 (defined, forexample, by fasteners coupling handle 1512 to cover 1508).

Referring to FIG. 16, head assembly 1500 is shown with cover 1508omitted to reveal a lid portion 1516. Lid portion 1516 is connected tobase portion 1504, and rotates relative to base portion 1504 (forexample, about axis 1510) between open and closed positions, asdiscussed earlier. Lid portion 1516 is shown in the closed position inFIG. 16. Lid portion 1516 is also connected to cover 1508, such thatcover 1508 and lid portion 1516 move together about axis 1510. However,some motion is permitted between cover 1508 and lid portion 1516, aswill be discussed below.

Lid portion 1516 includes a base plate 1518 with features similar tothose of base plate 300 discussed above (pylons 314 are not shown, butcan be included in embodiments where lid portion 1516 is biased towardsthe open position using springs connected to base portion 1504). Baseplate 1518 supports a sliding lock 1520. Lock 1520 is slideable betweenlocked and unlocked positions as discussed above in connection withlocks 312 and 1314, and is connected to base plate 1518 using raisedmembers and bars, as discussed in connection with locks 312 and 1314.Further, lock 1518 includes hooks (not shown) similar to hooks 332 forengaging base portion 1504 in the locked position.

The mechanism provided to slide lock 1520 between the locked andunlocked positions, however, differs from those discussed previously.Specifically, lock 1520 includes a pair of toothed racks 1524 (one rackobscured by handle 1512 in FIG. 16) on an upper surface thereof. Foreach rack 1524, a pinion gear 1528 is fixed to handle 1512, such thatgear 1528 rotates with handle 1512. Gear 1528 includes teeth configuredto engage with the teeth of rack 1524, and as a result, when handle 1512is rotated, gear 1528 also rotates, and the engagement of gear 1528 withrack 1524 causes rack 1524 to slide along base plate 1518.

Thus, it will now be apparent that from the position shown in FIGS. 15and 16, lifting handle 1512 in the direction “B” will first release lock1520 by rotating gears 1528 and sliding lock 1520 to the unlockedposition. Further movement of handle 1512 in direction “B” results inhandle 1512 and cover 1508 moving together about axis 1510, to bring lidportion 1516 to the open position. Closing and locking lid portion 1516reverses the above process: downwards pressure applied to handle 1512rotates handle 1512 and cover 1508 together about axis 1510 until lidportion 1516 reaches the closed position. Subsequently, continuedpressure on handle 1512 rotates handle 1512 relative to cover 1508,causing lock 1520 to slide to the locked position.

In the embodiment shown in FIGS. 15 and 16, therefore, handle 1512 ispermitted a certain degree of movement independent of cover 1508 and lidportion 1516. The extent to which handle 1512 can rotate about cover1508 independently of the rotation of cover 1508 about base portion 1504is determined by structures associated with gears 1528.

Referring now to FIG. 17A, gear 1528 and associated components are shownin greater detail. Gear 1528 is fixed to handle 1512 by way of anaperture 1700 which receives an axle 1704. Axle 1704 is in turn fixed toa fastener 1708, to which handle 1512 (not shown) is fixed. Axle 1704and fastener 1708 are rotatably connected to a track 1708, which isfixed to the interior of cover 1508. Track 1708 defines a channel inwhich a bolt 1712 is configured to slide between raised and loweredpositions. FIG. 17A shows bolt 1712 in the lowered position, while FIG.17B shows bolt 1712 in the raised position. Bolt 1712 is biased towardsthe lowered position by a spring 1714 connecting bolt 1712 and track1708.

Bolt 1712 includes a pin 1716 protruding outwards, towards gear 1528.Gear 1528 includes a slot 1720 defined therein (slot 1720 extendsthrough gear 1528 in the illustrated embodiment, but in otherembodiments slot 1720 can be implemented as a groove that does notextend straight through gear 1528), which receives pin 1716. At one end,slot 1720 is angled to provide a pit 1724. As seen in FIG. 17A, whenbolt 1712 is in the lowered position, pin 1716 extends into pit 1724,thus preventing rotation of gear 1528. Because gear 1528 cannot rotate,axle 1704, fastener 1708 and handle 1512 are also prevented fromrotating.

Rotation of gear 1528 and handle 1512 is enabled when bolt 1712 isdisplaced upwardly, into the raised position. Such displacement occurswhen a lower end 1728 of bolt 1712 contacts base plate 1518 of lidportion 1516 as lid portion 1518 and cover 1508 rotate towards theclosed position. Once lid portion 1518 has reached the closed position,cover 1508 continues to rotate about axis 1510, thus pressing lower end1728 of bolt 1712 onto base plate 1518. As a result, spring 1714 iscompressed and bolt 1712 slides from the lowered position to the raisedposition, shown in FIG. 17B. Pin 1716 is thus raised out of pit 1724,and permitted to slide along slot 1720. Handle 1512 is therefore freedto rotate relative to cover 1508, which causes gear 1528 to rotate (seeFIG. 17B), sliding lock 1520 to the locked position.

Persons skilled in the art will appreciate that there are yet morealternative implementations and modifications possible for implementingthe embodiments, and that the above implementations and examples areonly illustrations of one or more embodiments. The scope, therefore, isonly to be limited by the claims appended hereto.

I claim:
 1. A head assembly for a brewing apparatus, comprising: amovable lid portion coupled to a fixed base portion, the lid portionbeing rotatable between an open position for receiving a brewingcartridge, and a closed position for sealing the cartridge within theapparatus; a lock slideably coupled to the lid portion and having alocked position for engaging the base portion when the lid portion is inthe closed position, and an unlocked position for releasing the baseportion; a lever having a first end connected to the lock, an axis pointconnected to the lid portion, and a second end, the lever beingrotatable about the axis point for moving the lock between the lockedand unlocked positions; and a cover movably coupled to the lid portionand abutting the second end of the lever, such that pressure on thecover rotates the lid portion to the closed position, and subsequentlyrotates the lever so as to slide the lock into the locked position. 2.The brewing apparatus of claim 1 wherein the lock includes at least onehook depending therefrom, and wherein the base portion includes at leastone opening in an upper surface thereof for receiving the at least onehook.
 3. The brewing apparatus of claim 2 wherein the lock includes apair of hooks depending from opposing sides of a planar member, theplanar member being slidably coupled to the lid portion.
 4. The brewingapparatus of claim 1 wherein the lid portion further comprises a baseplate and a support tower extending upwards from the base plate, thesupport tower for rotatably supporting the lever at the axis point. 5.The brewing apparatus of claim 4 wherein the second end of the levercomprises a bearing surface for facilitating motion of the second endagainst the cover.
 6. The brewing apparatus of claim 5 wherein thebearing surface is provided by a roller bearing.
 7. The brewingapparatus of claim 1 wherein the lid portion is biased towards the openposition.
 8. The brewing apparatus of claim 1 wherein the lock is biasedtowards the unlocked position.
 9. The brewing apparatus of claim 1,further comprising an injection pin connected to the lid portion forpiercing a cartridge in the closed position.
 10. The brewing apparatusof claim 1, further comprising: a cartridge holder rotatably mountedwithin the base portion and having a resting position for receiving thecartridge, and an ejecting position for ejecting a spent cartridge. 11.The brewing apparatus of claim 10, further comprising: an arm having afirst end fixed to the lid portion and a second end configured tocontact the cartridge holder; wherein movement of the lid portion fromthe closed position to the open position causes movement of the arm forcontacting the cartridge holder and rotating the cartridge holder to theejection position.
 12. The brewing apparatus of claim 11 wherein the armis configured to contact a dog rotatably connected to the cartridgeholder, and wherein the dog is configured to resist rotation in a firstdirection for causing the cartridge holder to rotate, and to rotate inan opposite second direction.
 13. The brewing apparatus of claim 2,further comprising: a shuttle supporting an extraction needle andslideably mounted within the base portion, the shuttle having a restingposition and a brewing position for piercing a cartridge with theextraction needle; wherein the at least one hook is configured to engagethe shuttle for sliding the shuttle to the brewing position.
 14. Thebrewing apparatus of claim 13 wherein the extraction pin has a bendtherein.
 15. A head assembly for a brewing apparatus, comprising: amovable lid portion coupled to a fixed base portion, the lid portionbeing rotatable between an open position for receiving a brewingcartridge, and a closed position for sealing the cartridge within theapparatus; a lock slideably coupled to the lid portion and having alocked position for engaging the base portion when the lid portion is inthe closed position, and an unlocked position for releasing the baseportion; an articulated arm having a first end connected to the lock, anopposing second end connected to the lid portion, and a hinge betweenthe first end and the second end, the arm being configured to articulateabout the hinge between a bent position for placing the lock in theunlocked position, and a straightened position for placing the lock inthe locked position; and a cover movably coupled to the lid portion andconfigured for abutting the articulated arm adjacent to the hinge whenthe lid portion is in the closed position, such that pressure on thecover rotates the lid portion to the closed position, and subsequentlydisplaces the articulated arm to the straightened position.
 16. The headassembly of claim 15, comprising a second articulated arm having a firstend connected to the lock, an opposing second end connected to the lidportion, and a hinge between the first end and the second end.
 17. Thehead assembly of claim 15, the cover having an internal ledge configuredto contact the articulated arm adjacent to the hinge.
 18. The headassembly of claim 15, further comprising a spring having a first endconnected to the lid portion and a second end connected to an insidewall of the cover, wherein the spring is compressed when the lid portionis in the closed position and the lock is in the locked position.
 19. Ahead assembly for a brewing apparatus, comprising: a movable lid portioncoupled to a fixed base portion, the lid portion being rotatable betweenan open position for receiving a brewing cartridge, and a closedposition for sealing the cartridge within the apparatus; a lockslideably coupled to the lid portion and having a locked position forengaging the base portion when the lid portion is in the closedposition, and an unlocked position for releasing the base portion; thelock having a toothed rack disposed on an upper surface thereof; a covermovably coupled to the lid portion and having a handle rotatablyconnected thereto, the handle fixed to a pinion gear configured toengage the rack, such that rotation of the handle relative to the coverrotates the pinion gear and slides the lock to the locked position. 20.The head assembly of claim 19, further comprising: a track affixed to aninterior surface of the cover and defining a channel; a bolt slideablewithin the channel between a raised position and a lowered position, andhaving a pin extending into a slot defined within the pinion gear; theslot including a pit, for receiving the pin when the bolt is in thelowered position and preventing rotation of the pinion gear and handle.